Increase of the photosensitivity of undoped poly(methylmethacrylate) under UV radiation at 325 nm

Sáez Rodríguez, D., Nielsen, K., Bang, O. and Webb, D.J. (2014). Increase of the photosensitivity of undoped poly(methylmethacrylate) under UV radiation at 325 nm. IN: Micro-structured and specialty optical fibres III. Kalli, Kyriacos and Mendez, Alexis (eds) SPIE proceedings . Washington (US): SPIE.

Abstract

In this paper we report, for the first time to our knowledge, an increase of the photosensitivity of a microstructured polymer optical fibre (mPOF) made of undoped PMMA due to applied strain during the fabrication of the gratings. In the work, fibre Bragg gratings (FBGs) have been fabricated in undoped PMMA mPOFs with a hexagonal structure of three rings in the inner cladding. Two sets of FBGs were inscribed at two different resonant wavelengths (827 nm and 1562 nm) at different strains using an UV He-Cd laser at 325 nm focused by a lens and scanned over the fibre. We observed an increase of the reflection of the fibre Bragg gratings when the fabrication strain is higher. The photosensitivity mechanism is discussed in the paper along with the chemical reactions that could underlie the mechanism. Furthermore, the resolution limit of the material was investigated. © 2014 Copyright SPIE.

Publication DOI: https://doi.org/10.1117/12.2054297
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: Sáez Rodríguez, D.; Nielsen, K.; Bang, O.; Webb, D.J., "Increase of the photosensitivity of undoped poly(methylmethacrylate) under UV radiation at 325 nm", Micro-structured and specialty optical fibres III., eds. Kyriacos Kalli; Alexis Mendez. 91280P, 2014. Copyright 2014 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. http://dx.doi.org/10.1117/12.2054297
Event Title: Micro-structured and specialty optical fibres III
Event Type: Other
Event Dates: 2014-04-14 - 2014-04-15
Uncontrolled Keywords: FBG,fibre bragg grating,photosensitivity,PMMA,polymer optical fibre,Applied Mathematics,Computer Science Applications,Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials,Condensed Matter Physics
Full Text Link: http://proceedi ... ticleid=1868442
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2014
Authors: Sáez Rodríguez, D.
Nielsen, K.
Bang, O.
Webb, D.J. ( 0000-0002-5495-1296)

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